Vl CONTENTS [volume xlvii 



PAGE 

 425 



Contributions from the Rocky Mountain Herbarium. VIII Aven Nelson 

 The leaves of Podophyllum - - - . . J. Arthur Harris 438 

 A botanical survey of the Huron River valley. VII. 

 Position of the greatest peat deposit in local bogs 

 • (with five figures) George pjumf Bwm ^ 



Pollination in Linaria with special reference to cleis- 



1 £ m 4 A 



togamy (with four figures) 



Briefer Articles 



Longevity of seeds 



B. J. Hill 454 



William Crocker 68 



72 



Respnation calorimeter - - - . . George J . Peine 



Crataegus in Colorado -.--.. Francis Ranml 



The nature ot balanced solutions - - . W. J. V. Osterhout 148 



Ihe extrafascicular cambium of Ceratozamia. 

 Contributions from the Hull Botanical Labo- 

 ratory X23 (with plate VII) - - . . Helen A. Dorcty 150 



ihe mounting of algae T a at- , ■, 



tj„ 1 tt • / . . " J ■ A - Niewwland 2Vi 



Paul Hennings (with portrait) - - . . j p r. *' 



Pure cultures of fungi - . . Tnh i , • 39 



P*,-tw • • %>. . " Johanna \\ estcrdtjk 241 

 Parthenogenesis in Pwus pinaster (with seven 



figu 



Current Literature 



W . T. Saxton 406 

 md /. G. Hall 409 



For tides of books reviewed see index under an- "* "* "' ^ *' 



thor's name and reviews 

 Papers noticed in "Notes for Students" are in- 

 dexed under author's name and subjects 



DATES OF PUBLICATION 



No. Z% J ^£%*-' - N - * "arc,, ,,; So. 4 , A|)ril i;i 



